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Please help me with McBSP and Parallel ports!

Started by "dar...@yahoo.com [C55X]" October 7, 2014
Hi everyone! I'm an engineer student in my final year, and I want to design a digital guitar effect processor for my license project. I would use a TMS320VC5507 DSP with PCM3060 for data conversion and processing. A 16bit SDRAM for sound looper, and PIC based user interface via I2C.
I have some trouble wiring up the CODEC and the RAM to the DSP.
I've read the documentations regarding McBSP and I2S, but it's still somewhat unclear. I want to use the CODEC synchronously with ADC slave and DAC master. I connect Din to DX0, Dout to DR0, LRCLK1/2 to FCLKX0/R0, BCLK1/2 to CLKX0/R0, but then where to connect SCLK1/2 ? Or should I wire LRCLK1/2 and BCLK1/2 to GPIO-s both in master mode, and connect SCLK1/2 to CLKR0 ?
The second problem is: my dsp is in LQFP package, but the RAM reference device uses address pins available only on BGA chips. Could I interface a synchronous SDRAM with my DSP using A0 - A13 address lines?
If needed I could upload and share my schematic for better understanding. I want to send my board to a PCB manufacturer so every mistake would cost me.
Thanks in advance!

Posted by: d...@yahoo.com

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Mr. Prince,

In regards to the RAM, you shouldn't use a RAM with more address pins than you have, as you'll just be wasting capacity. You can get 512Mb devices on Digikey that only need 13 address lines; that is a huge amount of RAM for a C55x. If you really need more you can use multiple RAM chips on different chip selects.

Regards,
Bill
> -----Original Message-----
> From: C... [mailto:C...]
> Sent: Friday, September 26, 2014 4:47 AM
> To: C...
> Subject: [C55X] Please help me with McBSP and Parallel ports!
>
> Hi everyone! I'm an engineer student in my final year, and I want to design a
> digital guitar effect processor for my license project. I would use a
> TMS320VC5507 DSP with PCM3060 for data conversion and processing. A 16bit
> SDRAM for sound looper, and PIC based user interface via I2C.
> I have some trouble wiring up the CODEC and the RAM to the DSP.
> I've read the documentations regarding McBSP and I2S, but it's still somewhat
> unclear. I want to use the CODEC synchronously with ADC slave and DAC master.
> I connect Din to DX0, Dout to DR0, LRCLK1/2 to FCLKX0/R0, BCLK1/2 to CLKX0/R0,
> but then where to connect SCLK1/2 ? Or should I wire LRCLK1/2 and BCLK1/2 to
> GPIO-s both in master mode, and connect SCLK1/2 to CLKR0 ?
> The second problem is: my dsp is in LQFP package, but the RAM reference device
> uses address pins available only on BGA chips. Could I interface a synchronous
> SDRAM with my DSP using A0 - A13 address lines?
> If needed I could upload and share my schematic for better understanding. I
> want to send my board to a PCB manufacturer so every mistake would cost me.
> Thanks in advance!
>
> Posted by: d...@yahoo.com
>
>
> _____________________________________
> About this discussion group:
>
> Archives: http://www.dsprelated.com/groups/C55X/1.php
>
> To Post: Send an email to C...
>
> Other DSP Related Groups: http://www.dsprelated.com/groups.php
>
>
>
> Yahoo Groups Links
>
Posted by: Bill Finger

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